Importance of Plasma K+ Regulation - lecture
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Questions and Answers

What is the primary cause of hyperkalemia?

  • Decreased aldosterone release
  • Increased excretion of K+ in feces and sweat
  • Increased secretion of K+ (correct)
  • None of the above

What are the consequences of hyperkalemia?

  • Muscle weakness and respiratory failure
  • Cardiac arrhythmias and increased excitability of neurons and skeletal muscles (correct)
  • Increased secretion of aldosterone
  • None of the above

What is the primary cause of hypokalemia?

  • Increased aldosterone release
  • Kidney disease, diarrhea, and diuretics (correct)
  • Increased excretion of K+ in feces and sweat
  • None of the above

What are the consequences of hypokalemia?

<p>Muscle weakness and respiratory failure (A)</p> Signup and view all the answers

Which hormones are secreted by the cardiac atria and ventricles in response to Na+ retention, expansion of the ECF volume, and increase in arterial blood pressure?

<p>Atrial natriuretic peptide (ANP) and brain natriuretic peptide (BNP (A)</p> Signup and view all the answers

What are the effects of ANP and BNP?

<p>Natriuretic, diuretic, and hypotensive effects (A)</p> Signup and view all the answers

What is the process of sodium excretion in the urine called?

<p>Natriuretic (A)</p> Signup and view all the answers

What is the primary function of aldosterone?

<p>To promote K+ secretion (C)</p> Signup and view all the answers

What is the primary cause of muscle weakness and respiratory failure in hypokalemia?

<p>None of the above (D)</p> Signup and view all the answers

What is the primary cause of Na+ retention, expansion of the ECF volume, and increase in arterial blood pressure?

<p>Increased secretion of aldosterone (A)</p> Signup and view all the answers

What are the consequences of increased aldosterone release?

<p>Hypokalemia and muscle weakness (B)</p> Signup and view all the answers

What is the primary cause of increased aldosterone release?

<p>Na+ retention, expansion of the ECF volume, and increase in arterial blood pressure (B)</p> Signup and view all the answers

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